<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">
        首页
      </el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- 添加角色 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag> <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套 渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' :'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable @close="removeRightById(scope.row, item2.id)" type="success">{{ item2.authName }}</el-tag> <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag closable @close="removeRightById(scope.row, item3.id)" type="warning" v-for="(item3) in item2.children" :key="item3.id">{{ item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="editRole(scope.row)">编辑{{scope.row.id}}</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRole(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">权限分配</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      @close="addDialogClosed"
      width="50%">
      <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRuleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色信息对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editDialogVisible"
      @close="editDialogClosed"
      width="50%">
      <el-form :model="editRoleForm" :rules="addRoleFormRules" ref="editRoleFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRuleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      @close="setRightDialogClosed"
      width="50%">
      <!-- 树形控件 -->
      <el-tree ref="treeRef" show-checkbox node-key="id" :default-checked-keys="defKeys" :default-expand-all="true" :data="rightsList" :props="treeProps"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色的列表数据
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 1, max: 10, message: '角色名长度在 1 到 10 个字符之间' }
        ]
      },
      editDialogVisible: false,
      editRoleForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的权限数组
      defKeys: [],
      // 当前即将分配角色的权限id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if(res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
      // console.log(this.rolesList)
    },
    // 添加角色信息
    addRuleInfo() {
      this.$refs.addRoleFormRef.validate(async valid => {
        console.log(valid)
        if(!valid) return
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if(res.meta.status !== 201) {
          return this.$message.error('添加角色信息失败')
        }
        this.addDialogVisible = false
        this.$message.success('添加用户信息成功')
        this.getRolesList()
      })
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },
    // 添加角色提交
    editRole(roleInfo) {
      this.editRoleForm = roleInfo
      this.editDialogVisible = true
    },
    // 监听编辑角色对话框关闭事件
    editDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },
    // 发起请求 提交编辑后的角色信息
    editRuleInfo() {
      // 数据校验
      this.$refs.editRoleFormRef.validate(async valid => {
        if(!valid) return
        // 发起请求
        const { data: res } = await this.$http.put(`roles/${this.editRoleForm.id}`, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc
        })
        if(res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败')
        }
        this.getRolesList()
        this.editDialogVisible = false
        this.$message.success('修改用户信息成功')
      })
    },
    // 删除角色信息
    async removeRole(id) {
      // 判断是否真的删除
      const confirm = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消'
      }).catch(err => err)
      if(confirm !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if(res.meta.status !== 200) {
        return this.$message.error('删除角色失败')
      }
      this.getRolesList()
      this.$message.success('删除成功！')
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹窗提示用户是否删除权限
      const confirmRes = await this.$confirm('此操作将永久删除该权限，是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消'
      }).catch(err => err)
      if(confirmRes !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList()
      role.children = res.data
      this.$message.success('删除成功')
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if(res.meta.status !== 200) {
        return this.$message.error('获取所有权限数据失败！')
      }
      // 把获取到的权限数据获取到data中
      this.rightsList = res.data
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形势获取角色下所有三级权限的id，并保存到 defkeys中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      // console.log(keys)
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
